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Finding the Fourth Proportional to 620,551.80, 930,937.05 and 221,424.30

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Solution

The fourth proportional to 620,551.80, 930,937.05 and 221,424.30 is: 332,175.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,551.80 : 930,937.05 = 221,424.30 : x
  2. Step 2: Convert to fraction form
    620,551.80/930,937.05 = 221,424.30/x
  3. Step 3: Cross multiply
    620,551.80x = 930,937.05 × 221,424.30
  4. Step 4: Simplify right side
    620,551.80x = 206,132,084,640.32
  5. Step 5: Solve for x
    x = 206,132,084,640.32/620,551.80
  6. Step 6: Final answer
    x = 332,175.47

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.